Parry vs dodge

I've seen the illustrious AMR recommending parry and dodge gems and I've seen a lot of popular warrior tanks and friends clearly leaning heavy parry. I understand there is a diminishing returns on each one that is different from the other. Can someone put this into perspective? I've read ratios and preferences but I was hoping for marginally concrete data..

You can either maximize your avoidance by somehow balancing Dodge/Parry rating (here's a spreadsheet for this) or you can have a small dps boost by going full Parry.
The difference between the two builds is very small, like <1% Avoidance and <2% dps, so it really doesn't matter that much.

I gem for Parry because it's easier to do so than to balance Dodge/Parry.

You should keep both stats around the same ratings, while slightly favoring parry for 'Hold the Line'.

I've got about 9'500 dodge rating and 10'000 parry rating now with 546 item level. Furthermore I think parry is on DR now above 30%, but still getting enough benefit out of it.

@ Senen: Aww come on, it's not difficult. Besides that it's the most efficient way to delay the dr on parry as long as possible.
Red: Parry
Yellow: Dodge
Blue: exp/stam or parry/stam

Anyone knows when we get dr on parry and dodge? I've got a feeling that for parry it's somewhere between 30 and 33%.
I've got 32% parry now and when I gemmed my T16 chest with 3x parry it seemed I've got a little bit less parry for each gem.
It's still viable imo but just curious. Perhaps I'll have to test this in the days to come.

I was pretty sure that once you reached XX% of let's say parry, you no longer get - as example - 0.47% parry out of 320 rating, but instead 0.44%.
And this increases the more you get.

And if you seemingly know it does not work like that, perhaps you should explain then, Sir?

Edit: even the ingame tooltips says something like that in grey letters.. That's why I assume as above :P

DR does not "switch on" at a certain point - for all rating beyond 1, each point produces slightly less absolute change in the percentage value. However, it is, approximately, an exponential curve - the absolute avoidance percentage loss per point increases the more points you have. There is a gradual trend towards being noticable, but not a value at which suddenly it goes from not being there to being there.